The move marks the latest escalation in the ongoing power struggle within the party and comes days after the Mamata Banerjee-led Trinamool Congress expelled Ritabrata Banerjee over alleged anti-party activities.
New national working committee announced
Sources present at the meeting said an 11-member committee was constituted during a closed-door gathering at a hotel in New Town.
Former minister and MLA Arup Roy was appointed president of the newly formed National Working Committee.
The faction also passed a resolution suspending Abhishek Banerjee, who had served as the party's second-in-command, sources claimed.
The meeting reportedly drew participation from around 60 to 70 former and current councillors, along with several senior political figures.
Among those present were former state minister Javed Khan, Arup Roy and several councillors associated with the Kolkata Municipal Corporation, according to sources.
Mamata removed as Chairperson
The Ritabrata Banerjee camp also announced organisational changes that included the removal of Mamata Banerjee as chairperson of the party.
According to members of the faction, Arup Roy, the MLA from Howrah Madhya, was appointed to replace Mamata Banerjee as the party's chairperson.
Attendees said the Trinamool Congress name and party symbol were prominently displayed during the meeting.
However, photographs of Mamata Banerjee were absent from the venue.
Rebel camp cites ‘constitutional crisis’
Leaders associated with the faction said the meeting was convened to address what they described as a "constitutional crisis" within the organisation.
Addressing the gathering, Ritabrata Banerjee reportedly argued that the party constitution required the formation of a national working committee every three years and claimed that the previous committee's tenure had expired.
"The organisational structure was not renewed after the expiry of its tenure. Therefore, it became necessary to initiate the process of reconstituting the party's national leadership," a leader present at the meeting quoted Ritabrata Banerjee as saying.
The faction maintained that its actions were aimed at reorganising the party's leadership structure in accordance with constitutional provisions.
TMC now divided into multiple camps
The latest developments have further fragmented the Trinamool Congress, which now faces competing claims of legitimacy from different groups.
The Mamata Banerjee-led organisation continues to function as the principal faction of the party.
Meanwhile, Ritabrata Banerjee's group has positioned itself as the "real Trinamool" and currently functions as an opposition bloc in the West Bengal Assembly.
Adding to the complexity, nearly two dozen Lok Sabha MPs who broke away from the party have merged with the National Citizens Party, a relatively lesser-known political outfit, while extending support to the ruling National Democratic Alliance (NDA) in Parliament.
Battle over party identity intensifies
The suspension of Abhishek Banerjee has added another dimension to the dispute over the party's leadership and organisational control.
Questions remain over which faction can legitimately claim ownership of the party's leadership structure, election symbol and organisational assets.
According to sources, the rebel MPs have indicated that they may approach the Supreme Court to stake a claim over the party symbol.
Uncertainty also continues over control of the party's reported Rs 1,100 crore organisational fund, which could become a key issue as the dispute unfolds.
The latest decisions taken by the Ritabrata Banerjee-led faction are expected to further intensify the political and legal contest surrounding the future leadership and structure of the Trinamool Congress.